The meaning of SUPPLEMENTARY is added or serving as a supplement : additional. How to use supplementary in a sentence.

If an angle is supplementary to another angle, it forms 180 ° when combined with it.

Factsheet What does the word supplementary mean? There are seven meanings listed in OED's entry for the word supplementary. See ‘Meaning & use’ for definitions, usage, and quotation evidence.

SUPPLEMENTARY definition: Also of the nature of or forming a supplement; additional. See examples of supplementary used in a sentence.

Supplementary things are added to something in order to improve it. ...the question of whether or not we need to take supplementary vitamins. Provide them with additional background or with …

Supplementary is a little something extra to fill in a gap, like when your teacher suggests supplementary reading material that you may or may not get around to checking out. Supplementary can be an …

Dec 14, 2025 · Adjective supplementary (comparative more supplementary, superlative most supplementary) Additional; added to supply what is wanted.

When something is supplementary, it is meant to supplement or bolster the existing material or concept, filling in gaps, expanding upon the core idea, or offering further assistance.

SUPPLEMENTAL definition: supplementary. See examples of supplemental used in a sentence.

Definition of supplementary adjective in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.